Bug 1529139 - Add proper dependencies for win{32,64}.asm. r=froydnj

Differential Revision: https://phabricator.services.mozilla.com/D20587

--HG--
extra : moz-landing-system : lando

config/external/ffi/moz.build

@@ -93,7 +93,11 @@ else:
             # libffi asm needs to be preprocessed for MSVC
             GENERATED_FILES += ['win32.asm']
             asm = GENERATED_FILES['win32.asm']
-            asm.inputs = ['/js/src/ctypes/libffi/src/x86/win32.S']
+            asm.inputs = [
+                '/js/src/ctypes/libffi/src/x86/win32.S',
+                '!../../../js/src/ctypes/libffi/fficonfig.h',
+                '!../../../js/src/ctypes/libffi/include/ffi.h',
+            ]
             asm.script = 'preprocess_libffi_asm.py'
             asm.flags = ['$(DEFINES)', '$(LOCAL_INCLUDES)']
             SOURCES += ['!win32.asm']
@@ -106,7 +110,11 @@ else:
             # libffi asm needs to be preprocessed for MSVC
             GENERATED_FILES += ['win64.asm']
             asm = GENERATED_FILES['win64.asm']
-            asm.inputs = ['/js/src/ctypes/libffi/src/x86/win64.S']
+            asm.inputs = [
+                '/js/src/ctypes/libffi/src/x86/win64.S',
+                '!../../../js/src/ctypes/libffi/fficonfig.h',
+                '!../../../js/src/ctypes/libffi/include/ffi.h',
+            ]
             asm.script = 'preprocess_libffi_asm.py'
             asm.flags = ['$(DEFINES)', '$(LOCAL_INCLUDES)']
             SOURCES += ['!win64.asm']

config/external/ffi/preprocess_libffi_asm.py

@@ -12,7 +12,7 @@ import shlex
 import subprocess
 
 
-def main(output, input_asm, defines, includes):
+def main(output, input_asm, ffi_h, ffi_config_h, defines, includes):
     defines = shlex.split(defines)
     includes = shlex.split(includes)
     # CPP uses -E which generates #line directives. -EP suppresses them.