Use lld for linking on both Debug/Release builds

This follows Chromium's config, otherwise we get linking error:
/usr/bin/ld: shared_library/libmirclient.so.9: __cxa_finalize: invalid needed version 2
shared_library/libmirclient.so.9: error adding symbols: Bad value

brightray/brightray.gyp

@@ -129,7 +129,6 @@
                   '<(libchromiumcontent_dir)/libpdf.a',
                   '<(libchromiumcontent_dir)/libppapi_cpp_objects.a',
                   '<(libchromiumcontent_dir)/libppapi_internal_module.a',
-                  '<(libchromiumcontent_dir)/libjpeg.a',
                   '<(libchromiumcontent_dir)/libpdfium.a',
                   '<(libchromiumcontent_dir)/libfdrm.a',
                   '<(libchromiumcontent_dir)/libformfiller.a',

brightray/brightray.gypi

@@ -142,6 +142,11 @@
               '-Wl,-z,noexecstack',
             ],
           }],  # OS=="linux"
+          ['OS=="linux" and target_arch in ["ia32", "x64", "arm64"]', {
+            'ldflags': [
+              '-fuse-ld=lld',  # Chromium Clang uses lld for linking
+            ],
+          }],  # OS=="linux" and target_arch in ["ia32", "x64", "arm64"]
           ['OS=="mac"', {
             'defines': [
               # The usage of "webrtc/modules/desktop_capture/desktop_capture_options.h"
@@ -293,7 +298,6 @@
             ],
             'ldflags': [
               '-flto=thin',
-              '-fuse-ld=lld',  # Chromium Clang uses lld for doing LTO
               '-Wl,--icf=all',
               '-Wl,--lto-O0',  # this could be removed in future; see https://codereview.chromium.org/2939923004
               '-Wl,-mllvm,-function-sections',