find-debuginfo.sh: Filter out all <built-in> like fake file names.

There is no official way to mark an instruction range as being not
part of some actual source code, but as part of a compiler built-in
construct in DWARF. So different compilers have come up with fake
source file names like <built-in> or <__thread_local_inner macros>.
We already filtered out the strings "<internal>" and "<built-in>".
Just filter out all '(^|/)<[a-z _-]+>$'. They are fake files!

This is mainly to appease the rustc compiler which generates lots of
different variants to encode some instruction sequence is part of an
compiler generated macro expansion.

Signed-off-by: Mark Wielaard <mark@klomp.org>

scripts/find-debuginfo.sh

@@ -520,7 +520,11 @@ if [ -s "$SOURCEFILE" ]; then
   fi
 
   mkdir -p "${RPM_BUILD_ROOT}${debug_dest_name}"
-  LC_ALL=C sort -z -u "$SOURCEFILE" | grep -E -v -z '(<internal>|<built-in>)$' |
+  # Filter out anything compiler generated which isn't a source file.
+  # e.g. <internal>, <built-in>, <__thread_local_inner macros>.
+  # Some compilers generate them as if they are part of the working
+  # directory (which is why we match against ^ or /).
+  LC_ALL=C sort -z -u "$SOURCEFILE" | grep -E -v -z '(^|/)<[a-z _-]+>$' |
   (cd "${debug_base_name}"; cpio -pd0mL "${RPM_BUILD_ROOT}${debug_dest_name}")
   # stupid cpio creates new directories in mode 0700,
   # and non-standard modes may be inherented from original directories, fixup