Add a bunch of compile-time flags to the gyp build (and top-level Makefile)

build/standalone.gypi

Index: build/standalone.gypi
diff --git a/build/standalone.gypi b/build/standalone.gypi
index 56b487bd00289bab4cdc8b67e798a69826b342e8..81909f19a865818cb6b4c6a17232ecdec091cbe3 100644
--- a/build/standalone.gypi
+++ b/build/standalone.gypi
@@ -89,6 +89,9 @@
           [ 'visibility=="hidden"', {
             'cflags': [ '-fvisibility=hidden' ],
           }],
+          [ 'component=="shared_library"', {
+            'cflags': [ '-fPIC', ],
+          }],
         ],
       },
     }],  # 'OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris"'