build: Ensure that the "all" target appears before all Makefile includes

Otherwise builds without explicit target result in silent no-ops.

Makefile

@@ -106,6 +106,9 @@ DATA_FILES := $(wildcard $(SRC_PATH)/presets/*.avpreset)
 SKIPHEADERS = cmdutils_common_opts.h                                    \
               compat/w32pthreads.h
 
+# first so "all" becomes default target
+all: all-yes
+
 include $(SRC_PATH)/tools/Makefile
 include $(SRC_PATH)/common.mak
 

common.mak

@@ -2,9 +2,6 @@
 # common bits used by all libraries
 #
 
-# first so "all" becomes default target
-all: all-yes
-
 include $(SRC_PATH)/arch.mak
 
 OBJS      += $(OBJS-yes)