Disable inlining and loop unrolling in LTO without PGO profile

Such optimisations may significantly increase the binary size when
compiler heuristics are off. Disabling these helps cut down the
binary sizes with negligible decrease in performance, but allows us to
be more comfortable enabling LTO across various projects.

Test: m
Test: dex2oat, hwui, skia benchmark
Bug: 62839002
Change-Id: Id63e8dd295df2972f76ae4e29ee367080fff8429

cc/cc.go

@@ -211,6 +211,7 @@ type ModuleContextIntf interface {
 	selectedStl() string
 	baseModuleName() string
 	getVndkExtendsModuleName() string
+	isPgoCompile() bool
 }
 
 type ModuleContext interface {
@@ -408,6 +409,13 @@ func (c *Module) isVndk() bool {
 	return false
 }
 
+func (c *Module) isPgoCompile() bool {
+	if pgo := c.pgo; pgo != nil {
+		return pgo.Properties.PgoCompile
+	}
+	return false
+}
+
 func (c *Module) isVndkSp() bool {
 	if vndkdep := c.vndkdep; vndkdep != nil {
 		return vndkdep.isVndkSp()
@@ -507,6 +515,10 @@ func (ctx *moduleContextImpl) isVndk() bool {
 	return ctx.mod.isVndk()
 }
 
+func (ctx *moduleContextImpl) isPgoCompile() bool {
+	return ctx.mod.isPgoCompile()
+}
+
 func (ctx *moduleContextImpl) isVndkSp() bool {
 	return ctx.mod.isVndkSp()
 }