nbis: Add spatch file to use GLib memory management functions

Add an spatch/coccinelle file to replace all free/malloc/realloc calls
with g_free/g_malloc/g_realloc. It also removes all the error code paths
that we do not need to check anymore.

libfprint/nbis/glib-memory.cocci

@@ -0,0 +1,29 @@
+@ free @
+expression ptr;
+@@
+-	free(ptr);
++	g_free(ptr);
+@ malloc @
+type ptr_type;
+expression ptr;
+expression size;
+@@
+-	ptr = (ptr_type) malloc(size);
++	ptr = (ptr_type) g_malloc(size);
+	...
+(
+-	if (ptr == (ptr_type) NULL) { ... }
+|
+)
+@ realloc @
+type ptr_type;
+expression ptr;
+expression size;
+@@
+-	ptr = (ptr_type) realloc(ptr, size);
++	ptr = (ptr_type) g_realloc(ptr, size);
+	...
+(
+-	if (ptr == (ptr_type) NULL) { ... }
+|
+)

libfprint/nbis/update-from-nbis.sh

@@ -179,3 +179,5 @@ sed -i 's/[ \t]*$//' `find -name "*.[ch]"`
 # Remove usebsd.h
 sed -i '/usebsd.h/d' `find -name "*.[ch]"`
 
+# Use GLib memory management
+spatch --sp-file glib-memory.cocci --dir . --in-place