Make skgputest target depend on gl/glx/glu or egl/gles2 libs on linux

GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1846623003

Review URL: https://codereview.chromium.org/1846623003 .

gyp/gputest.gyp

@@ -57,6 +57,23 @@
             'angle.gyp:*',
           ],
         }],
+        [ '(skia_os == "linux" or skia_os == "chromeos") and skia_egl == 1', {
+          'link_settings': {
+            'libraries': [
+              '-lEGL',
+              '-lGLESv2',
+            ],
+          },
+        }],
+        [ '(skia_os == "linux" or skia_os == "chromeos") and skia_egl == 0', {
+          'link_settings': {
+            'libraries': [
+              '-lGL',
+              '-lGLU',
+              '-lX11',
+            ],
+          },
+        }],
         [ 'skia_os == "android"', {
           'defines': [
             'GR_GL_USE_NEW_SHADER_SOURCE_SIGNATURE=1',