build system: Generate dependency make rules for assembler source

Was previously only C, C++.

make/project.mk

@@ -172,7 +172,7 @@ LDFLAGS ?= -nostdlib \
 
 # CPPFLAGS used by C preprocessor
 # If any flags are defined in application Makefile, add them at the end. 
-CPPFLAGS := -DESP_PLATFORM $(CPPFLAGS) $(EXTRA_CPPFLAGS)
+CPPFLAGS := -DESP_PLATFORM -MMD -MP $(CPPFLAGS) $(EXTRA_CPPFLAGS)
 
 # Warnings-related flags relevant both for C and C++
 COMMON_WARNING_FLAGS = -Wall -Werror=all \
@@ -188,8 +188,7 @@ COMMON_FLAGS = \
 	-ffunction-sections -fdata-sections \
 	-fstrict-volatile-bitfields \
 	-mlongcalls \
-	-nostdlib \
-	-MMD -MP
+	-nostdlib
 
 # Optimization flags are set based on menuconfig choice
 ifneq ("$(CONFIG_OPTIMIZATION_LEVEL_RELEASE)","")