mac: Only use the flag -gline-tables-only for release builds.

Previously, the flag was being used for both debug and release builds.

BUG=480622

Review URL: https://codereview.chromium.org/1108933002

Cr-Commit-Position: refs/heads/master@{#327193}

build/common.gypi

@@ -5127,6 +5127,22 @@
             }],
           ],
         },
+        'configurations': {
+          'Release_Base': {
+            'conditions': [
+              ['branding=="Chrome" and buildtype=="Official"', {
+                'xcode_settings': {
+                  'OTHER_CFLAGS': [
+                    # The Google Chrome Framework dSYM generated by dsymutil has
+                    # grown larger than 4GB, which dsymutil can't handle. Reduce
+                    # the amount of debug symbols.
+                    '-gline-tables-only',  # See http://crbug.com/479841
+                  ]
+                },
+              }],
+            ],
+          },  # configuration "Release"
+        },  # configurations
         'xcode_settings': {
           'GCC_DYNAMIC_NO_PIC': 'NO',               # No -mdynamic-no-pic
                                                     # (Equivalent to -fPIC)
@@ -5144,16 +5160,6 @@
             # specified or not.
             '-fno-strict-aliasing',  # See http://crbug.com/32204.
           ],
-          'conditions': [
-            ['branding=="Chrome" and buildtype=="Official"', {
-              'OTHER_CFLAGS': [
-                # The Google Chrome Framework dSYM generated by dsymutil has
-                # grown larger than 4GB, which dsymutil can't handle. Reduce
-                # the amount of debug symbols.
-                '-gline-tables-only',  # See http://crbug.com/479841
-              ]
-            }],
-          ],
         },
         'target_conditions': [
           ['_type=="executable"', {