build node fix: get_gas_version from node v10.5.0

Author: Developerius

node/configure

@@ -676,24 +676,27 @@ def get_xcode_version(cc):
 
 def get_gas_version(cc):
   try:
+    custom_env = os.environ.copy()
+    custom_env["LC_ALL"] = "C"
     proc = subprocess.Popen(shlex.split(cc) + ['-Wa,-v', '-c', '-o',
                                                '/dev/null', '-x',
                                                'assembler',  '/dev/null'],
                             stdin=subprocess.PIPE, stderr=subprocess.PIPE,
-                            stdout=subprocess.PIPE)
+                            stdout=subprocess.PIPE, env=custom_env)
   except OSError:
     error('''No acceptable C compiler found!
 
        Please make sure you have a C compiler installed on your system and/or
        consider adjusting the CC environment variable if you installed
        it in a non-standard prefix.''')
 
-  match = re.match(r"GNU assembler version ([2-9]\.[0-9]+)",
-                   proc.communicate()[1])
+  gas_ret = proc.communicate()[1]
+  match = re.match(r"GNU assembler version ([2-9]\.[0-9]+)", gas_ret)
 
   if match:
     return match.group(1)
   else:
+    warn('Could not recognize `gas`: ' + gas_ret)
     return '0'
 
 # Note: Apple clang self-reports as clang 4.2.0 and gcc 4.2.1.  It passes