Unified sysroot: arch-X/include directories are gone.

Bug: N/A
Test: builds
Change-Id: I98fc6a1a3c0be1c90b1deb35b54f36ab16a202ac
diff --git a/cc/config/mips_device.go b/cc/config/mips_device.go
index c135029..d154426 100644
--- a/cc/config/mips_device.go
+++ b/cc/config/mips_device.go
@@ -147,7 +147,7 @@
 	pctx.StaticVariable("MipsCflags", strings.Join(mipsCflags, " "))
 	pctx.StaticVariable("MipsLdflags", strings.Join(mipsLdflags, " "))
 	pctx.StaticVariable("MipsCppflags", strings.Join(mipsCppflags, " "))
-	pctx.StaticVariable("MipsIncludeFlags", bionicHeaders("mips", "mips"))
+	pctx.StaticVariable("MipsIncludeFlags", bionicHeaders("mips"))
 
 	// Clang cflags
 	pctx.StaticVariable("MipsClangCflags", strings.Join(ClangFilterUnknownCflags(mipsClangCflags), " "))