Order libgc .c files lexicographically in cmake and automake scripts

(refactoring)

PR #598 (bdwgc).

* CMakeLists.txt (SRC): Order items lexicographically.
* Makefile.am [!SINGLE_GC_OBJ] (libgc_la_SOURCES): Likewise.

CMakeLists.txt

@@ -170,10 +170,10 @@ endif()
 
 include_directories(include)
 
-set(SRC alloc.c reclaim.c allchblk.c misc.c mach_dep.c os_dep.c
-        mark_rts.c headers.c mark.c obj_map.c blacklst.c finalize.c
-        new_hblk.c dbg_mlc.c malloc.c dyn_load.c typd_mlc.c ptr_chck.c
-        mallocx.c)
+set(SRC allchblk.c alloc.c blacklst.c dbg_mlc.c dyn_load.c finalize.c
+        headers.c mach_dep.c malloc.c mallocx.c mark.c mark_rts.c misc.c
+        new_hblk.c obj_map.c os_dep.c ptr_chck.c reclaim.c typd_mlc.c)
+
 set(NODIST_SRC)
 set(ATOMIC_OPS_LIBS)
 set(ATOMIC_OPS_LIBS_CMAKE)

Makefile.am

@@ -62,10 +62,9 @@ else
 
 EXTRA_DIST += extra/gc.c
 libgc_la_SOURCES = \
-    allchblk.c alloc.c blacklst.c dbg_mlc.c \
-    dyn_load.c finalize.c gc_dlopen.c headers.c \
-    mach_dep.c malloc.c mallocx.c mark.c mark_rts.c misc.c new_hblk.c \
-    obj_map.c os_dep.c ptr_chck.c reclaim.c specific.c typd_mlc.c
+    allchblk.c alloc.c blacklst.c dbg_mlc.c dyn_load.c finalize.c gc_dlopen.c \
+    headers.c mach_dep.c malloc.c mallocx.c mark.c mark_rts.c misc.c \
+    new_hblk.c obj_map.c os_dep.c ptr_chck.c reclaim.c specific.c typd_mlc.c
 
 # C Library: Architecture Dependent
 # ---------------------------------