Enable the -fPIC flag for arm, too

It seems that -fPIC is required for 32-bit ARM, too. Trying to link
against libv8 on an armv7l was causing the following linking error:

relocation R_ARM_THM_MOVW_ABS_NC against `a local symbol' can not be
used when making a shared object; recompile with -fPIC

Author: ignisf

CHANGELOG.md

@@ -1,5 +1,7 @@
 ### Unreleased
 
+* Enable the -fPIC flag for ARM
+
 ### 5.0.71.48.2, 5.0.71.48.3 - 2016-05-13:
 
 * Upgrade upstream v8 version to 5.0.71.45

patches/fPIC-for-static.patch

@@ -7,7 +7,7 @@ index 1252094..308a7e3 100644
              'cflags': [ '-fvisibility=hidden' ],
            }],
 -          [ 'component=="shared_library"', {
-+          [ 'component=="shared_library" or component=="static_library" and (v8_target_arch=="x64" or v8_target_arch=="arm64")', {
++          [ 'component=="shared_library" or component=="static_library" and (v8_target_arch=="x64" or v8_target_arch=="arm64" or v8_target_arch=="arm")', {
              'cflags': [ '-fPIC', ],
            }],
            [ 'coverage==1', {