Build system tweaks for Valgrind.

Added LOCAL_NO_CRT to enable building executables that do not link
to the C runtime library.

Removed support for LOCAL_MODULE_SUBDIR since it was broken
and unused.  (Was going to use it but ended up using LOCAL_MODULE_PATH
instead.)

Change-Id: I3b6f5ab7e5ae6aaa7119899adccece2b4ab1cbb3
diff --git a/core/combo/TARGET_linux-sh.mk b/core/combo/TARGET_linux-sh.mk
index 036ecd7..654539c 100644
--- a/core/combo/TARGET_linux-sh.mk
+++ b/core/combo/TARGET_linux-sh.mk
@@ -105,6 +105,7 @@
 TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_static.o
 TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_dynamic.o
 TARGET_CRTEND_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtend_android.o
+
 TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_STATIC_LIBRARIES)/sobegin.o
 TARGET_CRTEND_SO_O := $(TARGET_OUT_STATIC_LIBRARIES)/soend.o
 
@@ -119,7 +120,7 @@
 	-Wl,--gc-sections -Wl,-z,norelro \
 	-Wl,-shared,-Bsymbolic \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
-	$(PRIVATE_TARGET_CRTBEGIN_SO_O) \
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_SO_O)) \
 	$(PRIVATE_ALL_OBJECTS) \
 	-Wl,--whole-archive \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
@@ -130,7 +131,7 @@
 	$(PRIVATE_LDFLAGS) \
 	$(subst -lrt,, $(subst -lpthread,,$(PRIVATE_LDLIBS))) \
 	$(PRIVATE_TARGET_LIBGCC) \
-	$(PRIVATE_TARGET_CRTEND_SO_O)
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O))
 endef
 
 define transform-o-to-executable-inner
@@ -142,13 +143,13 @@
 	$(TARGET_GLOBAL_LD_DIRS) \
 	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
-	$(TARGET_CRTBEGIN_DYNAMIC_O) \
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTBEGIN_DYNAMIC_O)) \
 	$(PRIVATE_ALL_OBJECTS) \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
 	$(PRIVATE_LDFLAGS) \
 	$(TARGET_LIBGCC) \
 	$(subst -lrt,, $(subst -lpthread,,$(PRIVATE_LDLIBS))) \
-	$(TARGET_CRTEND_O)
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTEND_O))
 endef
 
 define transform-o-to-static-executable-inner
@@ -156,11 +157,11 @@
 	-Wl,--gc-sections -Wl,-z,norelro \
 	-o $@ \
 	$(TARGET_GLOBAL_LD_DIRS) \
-	$(TARGET_CRTBEGIN_STATIC_O) \
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTBEGIN_STATIC_O)) \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_ALL_OBJECTS) \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
 	$(TARGET_LIBGCC) \
 	$(subst -lrt,, $(subst -lpthread,,$(PRIVATE_LDLIBS))) \
-	$(TARGET_CRTEND_O)
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTEND_O))
 endef