Makefile: fix flask.h not found for non-gki

luyanci:
Sometimes,selinux compile will late then BBG itself.
And it will cause flash.h not generated,but BBG need it.
So we manual compile it if it not compiled.

This commit will close #70.

Author: dabao1955

Makefile

@@ -6,6 +6,15 @@ ccflags-y += -I$(objtree)/security/selinux -include $(srctree)/include/uapi/asm-
 
 obj-$(CONFIG_BBG) += bbg.o
 
+ifneq ($(wildcard $(objtree)/security/selinux/flask.h),)
+  $(info -- Baseband-guard: flask.h found, skip generation)
+else
+  $(info -- Baseband-guard: flask.h not found, starting generation)
+  $(shell $(HOSTCC) -I$(srctree)/scripts/selinux/genheaders -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89  -I$(srctree)/include/uapi  -I$(srctree)/include  -I$(srctree)/security/selinux/include -o $(objtree)/genheaders $(srctree)/scripts/selinux/genheaders/genheaders.c)
+  $(shell $(objtree)/genheaders flask.h av_permissions.h)
+  $(shell mv $(objtree)/flask.h $(objtree)/av_permissions.h $(objtree)/security/selinux)
+endif
+
 GIT_BIN := /usr/bin/env PATH="$$PATH":/usr/bin:/usr/local/bin git
 
 ifeq ($(findstring $(srctree),$(src)),$(srctree))