[m-rev.] bdwgc diff: Delete references to obsolete libatomic_ops directories.

[Peter Wang]

I noticed this when trying to build Mercury on AIX again. Ultimately,
it turned out not to be the cause of a problem I hit, but might as well fix it now.
I will update the version referenced by the boehm_gc submodule to
include this.

----

Mmakefile:
    Don't try to clean "libatomic_ops-1.2" and "libatomic_ops-install"
    directories as they no longer exist.

.gitignore:
    Don't ignore "libatomic_ops-install".

diff --git a/.gitignore b/.gitignore
index 7cd7159c..e7342c46 100644
--- a/.gitignore
+++ b/.gitignore
@@ -96,7 +96,6 @@ config.h.in~
 stamp-h1
 
 # External library (without trailing slash to allow symlinks):
-/libatomic_ops-install
 /pthreads-w32*
 
 # These files are generated by autoreconf:
diff --git a/Mmakefile b/Mmakefile
index 6ef024f0..7faeac37 100644
--- a/Mmakefile
+++ b/Mmakefile
@@ -76,19 +76,12 @@ endif
 clean_local:
 	rm -rf Release/ Debug/
 	rm -f *.obj gc.lib libgc.lib libpar_gc.lib libpar_gc.dll libgc_debug.lib
-	cd libatomic_ops-1.2 && $(MAKE) clean
 	cd libatomic_ops && $(MAKE) clean
-	rm -f libatomic_ops-1.2/Makefile libatomic_ops-1.2/tests/Makefile
-	rm -f libatomic_ops-1.2/src/Makefile
-	rm -f libatomic_ops-1.2/src/atomic_ops/Makefile
-	rm -f libatomic_ops-1.2/src/config.h
-	rm -f libatomic_ops-1.2/src/atomic_ops/sysdeps/Makefile
 	rm -f libatomic_ops/Makefile libatomic_ops/tests/Makefile
 	rm -f libatomic_ops/src/Makefile
 	rm -f libatomic_ops/src/atomic_ops/Makefile
 	rm -f libatomic_ops/src/config.h
 	rm -f libatomic_ops/src/atomic_ops/sysdeps/Makefile
-	rm -rf libatomic_ops-install
 else 
 
 submake: Makefile force 
@@ -103,20 +96,13 @@ submake: Makefile force
 clean_local:
 	MAKEFLAGS=""; export MAKEFLAGS; \
 	$(MAKE) $(BOEHMGC_MAKEFILE) $(MMAKEFLAGS) clean
-	-cd libatomic_ops-1.2 && $(MAKE) $(MMAKEFLAGS) clean
 	-cd libatomic_ops && $(MAKE) $(MMAKEFLAGS) clean
 	rm -f libgc.$A libgc.so libgc.dylib libpar_gc.$A libpar_gc.dll
-	rm -f libatomic_ops-1.2/Makefile libatomic_ops-1.2/tests/Makefile
-	rm -f libatomic_ops-1.2/src/Makefile
-	rm -f libatomic_ops-1.2/src/atomic_ops/Makefile
-	rm -f libatomic_ops-1.2/src/config.h
-	rm -f libatomic_ops-1.2/src/atomic_ops/sysdeps/Makefile
 	rm -f libatomic_ops/Makefile libatomic_ops/tests/Makefile
 	rm -f libatomic_ops/src/Makefile
 	rm -f libatomic_ops/src/atomic_ops/Makefile
 	rm -f libatomic_ops/src/config.h
 	rm -f libatomic_ops/src/atomic_ops/sysdeps/Makefile
-	rm -rf libatomic_ops-install
 	rm -f Makefile
 
 # Makefile.direct is the makefile supplied with the Boehm tarball.  We have
-- 
2.31.0