Split local and global cflags

Native compiler flags are currently applied in approximately:
global cflags
local cflags
local include dirs
global include dirs
global conlyflags
local conlyflags
global cppflags
local cppflags

This means that a flag that is enabled in the global cppflags
cannot be disabled in the local cflags, and an Android.bp author
must know to disable it in the local cppflags.  A better order
would be:
global cflags
global conlyflags
global cppflags
local cflags
local conlyflags
local cppflags
local include dirs
global include dirs

We are mixing both the global and local cflags into a single
variable, and similar for conlyflags and cppflags, which
prevents reordering them.  This CL prepares to reorder them
by splitting the global and local cflags into separate variables.

Bug: 143713277
Test: m native
Change-Id: Ic55a8c3516c331dc5f2af9d00e59ceca9d3e6c15
diff --git a/cc/compdb.go b/cc/compdb.go
index ecc67b8..519380f 100644
--- a/cc/compdb.go
+++ b/cc/compdb.go
@@ -152,12 +152,16 @@
 		clangPath = ccPath
 	}
 	args = append(args, clangPath)
-	args = append(args, expandAllVars(ctx, ccModule.flags.GlobalFlags)...)
-	args = append(args, expandAllVars(ctx, ccModule.flags.CFlags)...)
+	args = append(args, expandAllVars(ctx, ccModule.flags.Global.CommonFlags)...)
+	args = append(args, expandAllVars(ctx, ccModule.flags.Local.CommonFlags)...)
+	args = append(args, expandAllVars(ctx, ccModule.flags.Global.CFlags)...)
+	args = append(args, expandAllVars(ctx, ccModule.flags.Local.CFlags)...)
 	if isCpp {
-		args = append(args, expandAllVars(ctx, ccModule.flags.CppFlags)...)
+		args = append(args, expandAllVars(ctx, ccModule.flags.Global.CppFlags)...)
+		args = append(args, expandAllVars(ctx, ccModule.flags.Local.CppFlags)...)
 	} else if !isAsm {
-		args = append(args, expandAllVars(ctx, ccModule.flags.ConlyFlags)...)
+		args = append(args, expandAllVars(ctx, ccModule.flags.Global.ConlyFlags)...)
+		args = append(args, expandAllVars(ctx, ccModule.flags.Local.ConlyFlags)...)
 	}
 	args = append(args, expandAllVars(ctx, ccModule.flags.SystemIncludeFlags)...)
 	args = append(args, src.String())