Remove timestamp to support reproducible builds.

--- psm-3.3/Makefile~	1970-01-01 01:00:00.000000000 +0100
+++ psm-3.3/Makefile	2017-10-22 15:32:11.736949002 +0100
@@ -326,7 +326,7 @@
 # file around.  Generate it such that the ident command can find it
 # and strings -a | grep InfiniPath does a reasonable job as well.
 ${TARGLIB}.so.${MAJOR}.${MINOR}: ${${TARGLIB}-objs}
-	date +'char psmi_infinipath_revision[] ="$$""Date: %F %R ${rpm_extra_description}InfiniPath $$";' > ${lib_build_dir}/_revision.c
+	echo 'char psmi_infinipath_revision[] ="$$""Date: 1970-01-01 00:00 ${rpm_extra_description}InfiniPath $$";' > ${lib_build_dir}/_revision.c
 	$(CC) -c $(BASECFLAGS) $(INCLUDES) _revision.c -o _revision.o
 	$(CC) $(LDFLAGS) -o $@ -Wl,-soname=${TARGLIB}.so.${MAJOR} -shared -Wl,--unique='*fastpath*' \
 		${${TARGLIB}-objs} _revision.o -L$(build_dir)/ipath $(LDLIBS)

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<tr><td><span title='2019-02-15 12:12:09 +0100'>2019-02-15</span></td><td><a href='/guix/commit/gnu/packages/patches/clang-7.0-libc-search-path.patch?id=d199a4c7b4c4d3320ed59e96a382f4c577630360'>gnu: LLVM, Clang: Update to 7.0.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/patches/clang-7.0-libc-search-path.patch: New file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/llvm.scm (llvm, clang-runtime, clang): Update to 7.0.1.
(llvm-7.0.1): Remove variable.
(clang-from-llvm)[arguments]: Adjust phase to match Clang 7.
(llvm-6, clang-runtime-6, clang-6): New public variables.
* gnu/packages/dlang.scm (ldc)[native-inputs]: Change LLVM and CLANG to
LLVM-6.0 and CLANG-6.0.
* gnu/packages/gl.scm (mesa)[inputs]: Change from LLVM to LLVM-6.
</span></span></td><td>Marius Bakke</td></tr>