Set visibility of global symbols used in ARM specific assembly file to
internal.

Taken from Debian:
https://salsa.debian.org/multimedia-team/mpeg2dec/blob/master/debian/patches/60_arm-private-symbols.patch

--- mpeg2dec.orig/libmpeg2/motion_comp_arm_s.S
+++ mpeg2dec/libmpeg2/motion_comp_arm_s.S
@@ -23,7 +23,8 @@
 
 @ ----------------------------------------------------------------
 	.align
-	.global MC_put_o_16_arm
+	.global   MC_put_o_16_arm
+	.internal MC_put_o_16_arm
 MC_put_o_16_arm:
 	@@ void func(uint8_t * dest, const uint8_t * ref, int stride, int height)
 	pld [r1]
@@ -83,7 +84,8 @@ MC_put_o_16_arm_align_jt:
 
 @ ----------------------------------------------------------------
 	.align
-	.global MC_put_o_8_arm
+	.global   MC_put_o_8_arm
+	.internal MC_put_o_8_arm
 MC_put_o_8_arm:
 	@@ void func(uint8_t * dest, const uint8_t * ref, int stride, int height)
 	pld [r1]
@@ -152,7 +154,8 @@ MC_put_o_8_arm_align_jt:
 .endm
 
 	.align
-	.global MC_put_x_16_arm
+	.global   MC_put_x_16_arm
+	.internal MC_put_x_16_arm
 MC_put_x_16_arm:
 	@@ void func(uint8_t * dest, const uint8_t * ref, int stride, int height)
 	pld [r1]
@@ -244,7 +247,8 @@ MC_put_x_16_arm_align_jt:
 
 @ ----------------------------------------------------------------
 	.align
-	.global MC_put_x_8_arm
+	.global   MC_put_x_8_arm
+	.internal MC_put_x_8_arm
 MC_put_x_8_arm:
 	@@ void func(uint8_t * dest, const uint8_t * ref, int stride, int height)
 	pld [r1]
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<div class='path'>path: <a href='/guix/log/?id=8deec946542700d5a9ddf98df3a3a6684cd13dd8'>root</a>/<a href='/guix/log/scripts?id=8deec946542700d5a9ddf98df3a3a6684cd13dd8'>scripts</a>/<a href='/guix/log/scripts/guix.in?id=8deec946542700d5a9ddf98df3a3a6684cd13dd8'>guix.in</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/scripts/guix.in?id=8deec946542700d5a9ddf98df3a3a6684cd13dd8&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-12-11 19:06:53 +0100'>2020-12-11</span></td><td><a href='/guix/commit/scripts/guix.in?id=fd247542215fbd10f28980f3d5255014b150e95a'>build: 'script/guix' uses our own 'guile' executable.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>