Fix gyp files so that gyp_to_Android.mk succeeds

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1630723003

Review URL: https://codereview.chromium.org/1630723003
diff --git a/gyp/android_deps.gyp b/gyp/android_deps.gyp
index 1a0c758..1a8d81b 100644
--- a/gyp/android_deps.gyp
+++ b/gyp/android_deps.gyp
@@ -64,7 +64,7 @@
             },
           },
           {
-            'target_name': 'dng_sdk',
+            'target_name': 'libdng_sdk',
             'type': 'none',
             'direct_dependent_settings': {
               'libraries' : [
@@ -76,7 +76,7 @@
             },
           },
           {
-            'target_name': 'piex',
+            'target_name': 'libpiex',
             'type': 'none',
             'direct_dependent_settings': {
               'libraries' : [
diff --git a/gyp/dng_sdk.gyp b/gyp/dng_sdk.gyp
index 1daebe1..14a5b58 100644
--- a/gyp/dng_sdk.gyp
+++ b/gyp/dng_sdk.gyp
@@ -9,11 +9,11 @@
   'type': 'none',
   'conditions': [
     [ 'skia_android_framework', {
-        'dependencies': [ 'android_deps.gyp:dng_sdk' ],
-        'export_dependent_settings': [ 'android_deps.gyp:dng_sdk' ],
+        'dependencies': [ 'android_deps.gyp:libdng_sdk' ],
+        'export_dependent_settings': [ 'android_deps.gyp:libdng_sdk' ],
       }, {
-        'dependencies': [ 'dng_sdk' ],
-        'export_dependent_settings': [ 'dng_sdk' ],
+        'dependencies': [ 'dng_sdk.gyp:dng_sdk' ],
+        'export_dependent_settings': [ 'dng_sdk.gyp:dng_sdk' ],
     }]
   ]
 },{
@@ -131,11 +131,11 @@
     ],
   },
   'dependencies': [
-    'libjpeg-turbo.gyp:libjpeg-turbo',
+    'libjpeg-turbo-selector.gyp:libjpeg-turbo-selector',
     'zlib.gyp:zlib',
   ],
   'export_dependent_settings': [
-    'libjpeg-turbo.gyp:libjpeg-turbo',
+    'libjpeg-turbo-selector.gyp:libjpeg-turbo-selector',
     'zlib.gyp:zlib',
   ],
   'direct_dependent_settings': {
diff --git a/gyp/piex.gyp b/gyp/piex.gyp
index c59dc69..7822cd5 100644
--- a/gyp/piex.gyp
+++ b/gyp/piex.gyp
@@ -17,11 +17,11 @@
   'type': 'none',
   'conditions': [
     [ 'skia_android_framework', {
-        'dependencies': [ 'android_deps.gyp:piex' ],
-        'export_dependent_settings': [ 'android_deps.gyp:piex' ],
+        'dependencies': [ 'android_deps.gyp:libpiex' ],
+        'export_dependent_settings': [ 'android_deps.gyp:libpiex' ],
       }, {
-        'dependencies': [ 'piex' ],
-        'export_dependent_settings': [ 'piex' ],
+        'dependencies': [ 'piex.gyp:piex' ],
+        'export_dependent_settings': [ 'piex.gyp:piex' ],
     }]
   ]
 },{