Fix build tags for Go 1.17

audio/internal/oboe/gen.go

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build ignore
 // +build ignore
 
 package main

mobile/ebitenmobileview/impl_metal.go

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build (darwin && ios && arm) || (darwin && ios && arm64)
 // +build darwin,ios,arm darwin,ios,arm64
 
 package ebitenmobileview

mobile/ebitenmobileview/impl_notmetal.go

@@ -12,9 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// +build darwin,ios
-// +build !arm
-// +build !arm64
+//go:build darwin && ios && !arm && !arm64
+// +build darwin,ios,!arm,!arm64
 
 package ebitenmobileview
 

mobile/ebitenmobileview/input.go

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build android || ios
 // +build android ios
 
 package ebitenmobileview

mobile/ebitenmobileview/input_ios.go

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build ios
 // +build ios
 
 package ebitenmobileview

mobile/ebitenmobileview/mobile.go

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build android || ios
 // +build android ios
 
 // Package ebitenmobileview offers functions for OpenGL/Metal view of mobiles.