mbgl-config: also pass sqlite, curl, png, and boost ldflags along

gyp/install.gypi

@@ -18,6 +18,20 @@
             { 'files': [ '<(PRODUCT_DIR)/libmbgl-<(platform).a' ], 'destination': '<(install_prefix)/lib' },
             { 'files': [ '../include/mbgl' ], 'destination': '<(install_prefix)/include' }
           ],
+          'variables': {
+            'conditions': [
+              ['OS == "linux"', {
+                  'other_ldflags': [
+                      '-L<(boost_root)/lib',
+                      '-lboost_regex',
+                      '<@(glfw3_static_libs)',
+                      '<@(glfw3_ldflags)',
+                  ]
+              }, {
+                  'other_ldflags': [ ]
+              }]
+            ],
+          },
           'actions': [
               { 'action_name': 'mbgl-config',  
                 'inputs': [
@@ -31,7 +45,10 @@
                     './utils/mbgl-config/build.sh',
                     '<(install_prefix)',
                     '<(platform)',
-                    '<@(png_ldflags)'
+                    '<@(sqlite3_ldflags)',
+                    '<@(curl_ldflags)',
+                    '<@(png_ldflags)',
+                    '<@(other_ldflags)'
                 ]
               }
           ]