Add an extra layer of quoting to ltmain.sh sanity check.

--- a/configure	2005-05-07 14:19:31.000000000 +0200
+++ b/configure	2015-02-10 11:16:32.456146934 +0100
@@ -6266,7 +6266,7 @@
   exit 1
 fi
 gentoo_lt_version="1.5.16"
-gentoo_ltmain_version=`grep '^[:space:]*VERSION=' $ltmain | sed -e 's|^[:space:]*VERSION=||'`
+gentoo_ltmain_version=`grep '^[[:space:]]*VERSION=' $ltmain | sed -e 's|^[[:space:]]*VERSION=||'`
 if test "$gentoo_lt_version" != "$gentoo_ltmain_version"; then
   echo "$as_me:$LINENO: result: no" >&5
 echo "${ECHO_T}no" >&6
--- a/aclocal.m4	2005-05-07 14:19:25.000000000 +0200
+++ b/aclocal.m4	2015-02-10 11:16:15.352030318 +0100
@@ -246,7 +246,7 @@
   exit 1
 fi
 gentoo_lt_version="1.5.16"
-gentoo_ltmain_version=`grep '^[[:space:]]*VERSION=' $ltmain | sed -e 's|^[[:space:]]*VERSION=||'`
+gentoo_ltmain_version=`[grep '^[[:space:]]*VERSION=' $ltmain | sed -e 's|^[[:space:]]*VERSION=||']`
 if test "$gentoo_lt_version" != "$gentoo_ltmain_version"; then
   AC_MSG_RESULT(no)
   echo
--- a/libcpufreq/configure	2005-05-07 14:19:31.000000000 +0200
+++ b/libcpufreq/configure	2015-02-10 11:16:32.456146934 +0100
@@ -6266,7 +6266,7 @@
   exit 1
 fi
 gentoo_lt_version="1.5.16"
-gentoo_ltmain_version=`grep '^[:space:]*VERSION=' $ltmain | sed -e 's|^[:space:]*VERSION=||'`
+gentoo_ltmain_version=`grep '^[[:space:]]*VERSION=' $ltmain | sed -e 's|^[[:space:]]*VERSION=||'`
 if test "$gentoo_lt_version" != "$gentoo_ltmain_version"; then
   echo "$as_me:$LINENO: result: no" >&5
 echo "${ECHO_T}no" >&6
--- a/libcpufreq/aclocal.m4	2005-05-07 14:19:25.000000000 +0200
+++ b/libcpufreq/aclocal.m4	2015-02-10 11:16:15.352030318 +0100
@@ -246,7 +246,7 @@
   exit 1
 fi
 gentoo_lt_version="1.5.16"
-gentoo_ltmain_version=`grep '^[[:space:]]*VERSION=' $ltmain | sed -e 's|^[[:space:]]*VERSION=||'`
+gentoo_ltmain_version=`[grep '^[[:space:]]*VERSION=' $ltmain | sed -e 's|^[[:space:]]*VERSION=||']`
 if test "$gentoo_lt_version" != "$gentoo_ltmain_version"; then
   AC_MSG_RESULT(no)
   echo
eb2560364d25d78d40213aa1dcb1602f'>root</a>/<a href='/guix/log/gnu?id=b61f3776eb2560364d25d78d40213aa1dcb1602f'>gnu</a>/<a href='/guix/log/gnu/bootloader?id=b61f3776eb2560364d25d78d40213aa1dcb1602f'>bootloader</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/bootloader?id=b61f3776eb2560364d25d78d40213aa1dcb1602f&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-05-22 11:15:30 +0800'>2024-05-22</span></td><td><a href='/guix/commit/gnu/bootloader?id=c7aec90a916a99067fd9915337caf098ee8e5083'>bootloader: Add u-boot-starfive-visionfive2-bootloader.</a><span class='msg-avail'>...</span></td><td>Zheng Junjie</td></tr>
<tr><td><span title='2024-03-31 22:26:21 +0200'>2024-03-31</span></td><td><a href='/guix/commit/gnu/bootloader?id=64187b65d3acb13b91dd83fc8e7209c8ef538078'>bootloader: Add u-boot-qemu-riscv64-bootloader.</a><span class='msg-avail'>...</span></td><td>Zheng Junjie</td></tr>
<tr><td><span title='2024-01-14 23:00:03 +0100'>2024-01-14</span></td><td><a href='/guix/commit/gnu/bootloader?id=086850e5b2b4a1744565fe83624d256524b64a49'>bootloader: grub: Add support for loading an additional initrd.</a><span class='msg-avail'>...</span></td><td>Tomas Volf</td></tr>
<tr><td><span title='2023-12-22 16:06:03 -0800'>2023-12-22</span></td><td><a href='/guix/commit/gnu/bootloader?id=88fb95903c1d94b3be7e8a811d943af988041e4e'>gnu: bootloader: Add orangepi-r1-plus-lts-rk3328 bootloader.</a><span class='msg-avail'>...</span></td><td>Herman Rimm</td></tr>
<tr><td><span title='2023-07-13 18:59:13 +0200'>2023-07-13</span></td><td><a href='/guix/commit/gnu/bootloader?id=c22c29b0c4821ebe2c66a6c76562a41d33ff8392'>bootloader: grub: Use rumpdisk-style root when booting with "noide".</a><span class='msg-avail'>...</span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-06-14 14:52:21 +0300'>2023-06-14</span></td><td><a href='/guix/commit/gnu/bootloader?id=39250fc6229d60b7ae397749caf1e4c99e49b419'>gnu: bootloader: Add u-boot-sifive-unmatched-bootloader.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>