core: Don't debug native modules when TARGET_BUILD_TYPE==debug

Don't make the simulator default to debug mode.

Remove all global "debug" {C,CPP}FLAGS, which are no longer used.
diff --git a/core/config.mk b/core/config.mk
index 90a40a7..1ce5937 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -76,11 +76,9 @@
 
 # These can be changed to modify both host and device modules.
 COMMON_GLOBAL_CFLAGS:= -DANDROID -fmessage-length=0 -W -Wall -Wno-unused
-COMMON_DEBUG_CFLAGS:=
 COMMON_RELEASE_CFLAGS:= -DNDEBUG -UDEBUG
 
 COMMON_GLOBAL_CPPFLAGS:=
-COMMON_DEBUG_CPPFLAGS:=
 COMMON_RELEASE_CPPFLAGS:=
 
 # Set the extensions used for various packages
@@ -227,19 +225,15 @@
 # ###############################################################
 
 HOST_GLOBAL_CFLAGS += $(COMMON_GLOBAL_CFLAGS)
-HOST_DEBUG_CFLAGS += $(COMMON_DEBUG_CFLAGS)
 HOST_RELEASE_CFLAGS += $(COMMON_RELEASE_CFLAGS)
 
 HOST_GLOBAL_CPPFLAGS += $(COMMON_GLOBAL_CPPFLAGS)
-HOST_DEBUG_CPPFLAGS += $(COMMON_DEBUG_CPPFLAGS)
 HOST_RELEASE_CPPFLAGS += $(COMMON_RELEASE_CPPFLAGS)
 
 TARGET_GLOBAL_CFLAGS += $(COMMON_GLOBAL_CFLAGS)
-TARGET_DEBUG_CFLAGS += $(COMMON_DEBUG_CFLAGS)
 TARGET_RELEASE_CFLAGS += $(COMMON_RELEASE_CFLAGS)
 
 TARGET_GLOBAL_CPPFLAGS += $(COMMON_GLOBAL_CPPFLAGS)
-TARGET_DEBUG_CPPFLAGS += $(COMMON_DEBUG_CPPFLAGS)
 TARGET_RELEASE_CPPFLAGS += $(COMMON_RELEASE_CPPFLAGS)
 
 HOST_GLOBAL_LD_DIRS += -L$(HOST_OUT_INTERMEDIATE_LIBRARIES)
@@ -250,7 +244,7 @@
 
 # Many host compilers don't support these flags, so we have to make
 # sure to only specify them for the target compilers checked in to
-# the source tree. The simulator uses the target flags but the
+# the source tree. The simulator passes the target flags to the
 # host compiler, so only set them for the target when the target
 # is not the simulator.
 ifneq ($(TARGET_SIMULATOR),true)
@@ -258,21 +252,11 @@
 TARGET_GLOBAL_CPPFLAGS += $(TARGET_ERROR_FLAGS)
 endif
 
-ifeq ($(HOST_BUILD_TYPE),release)
-HOST_GLOBAL_CFLAGS+= $(HOST_RELEASE_CFLAGS)
-HOST_GLOBAL_CPPFLAGS+= $(HOST_RELEASE_CPPFLAGS)
-else
-HOST_GLOBAL_CFLAGS+= $(HOST_DEBUG_CFLAGS)
-HOST_GLOBAL_CPPFLAGS+= $(HOST_DEBUG_CPPFLAGS)
-endif
+HOST_GLOBAL_CFLAGS += $(HOST_RELEASE_CFLAGS)
+HOST_GLOBAL_CPPFLAGS += $(HOST_RELEASE_CPPFLAGS)
 
-ifeq ($(TARGET_BUILD_TYPE),release)
-TARGET_GLOBAL_CFLAGS+= $(TARGET_RELEASE_CFLAGS)
-TARGET_GLOBAL_CPPFLAGS+= $(TARGET_RELEASE_CPPFLAGS)
-else
-TARGET_GLOBAL_CFLAGS+= $(TARGET_DEBUG_CFLAGS)
-TARGET_GLOBAL_CPPFLAGS+= $(TARGET_DEBUG_CPPFLAGS)
-endif
+TARGET_GLOBAL_CFLAGS += $(TARGET_RELEASE_CFLAGS)
+TARGET_GLOBAL_CPPFLAGS += $(TARGET_RELEASE_CPPFLAGS)
 
 # TODO: do symbol compression
 TARGET_COMPRESS_MODULE_SYMBOLS := false