depend-cleanup: Fix match for asm files

[emaste]

Summary

Some routines (strcmp, strncmp, strlen) switched from an asm
implementation from arm-optimized-routines to a new asm implementation.
The default clean_dep rule matches both the old and new dependency
string, resulting in those routines always being rebuilt. Instead use
"arm-optimized-routines" (i.e., contrib subdir for the previous
implementation) as the matching regex.

[fuz]

This looks reasonable. Please also apply the following hunks to remove generated source files that otherwise interfere with the build:

diff --git a/tools/build/depend-cleanup.sh b/tools/build/depend-cleanup.sh
index 6f97747183a8..c40fdb53346b 100755
--- a/tools/build/depend-cleanup.sh
+++ b/tools/build/depend-cleanup.sh
@@ -243,6 +243,7 @@ fi
 if [ $MACHINE_ARCH = aarch64 ]; then
 	# 20250110  5e7d93a60440  add strcmp SIMD implementation
 	clean_dep   lib/libc strcmp S
+	run rm -f "$OBJTOP"/lib/libc/strcmp.S
 
 	# 20250110  b91003acffe7  add strspn optimized implementation
 	clean_dep   lib/libc strspn c
@@ -261,6 +262,7 @@ if [ $MACHINE_ARCH = aarch64 ]; then
 
 	# 20250110  25c485e14769  add strncmp SIMD implementation
 	clean_dep   lib/libc strncmp S
+	run rm -f "$OBJTOP"/lib/libc/strncmp.S
 
 	# 20250110  bad17991c06d  add memccpy SIMD implementation
 	clean_dep   lib/libc memccpy c
@@ -273,6 +275,7 @@ if [ $MACHINE_ARCH = aarch64 ]; then
 
 	# 20250110  3863fec1ce2d  add strlen SIMD implementation
 	clean_dep   lib/libc strlen S
+	run rm -f "$OBJTOP"/lib/libc/strlen.S
 
 	# 20250110  79e01e7e643c  add bcopy & bzero wrapper
 	clean_dep   lib/libc bcopy c

[emaste]

also remove generated files

[fuz]

Thanks. I think that should be good now.