all: update to new attribute syntax [attr] -> @[attr] (#271)

android/ndk/compiler_flags.v

@@ -10,13 +10,13 @@ const (
 	ndk_supported_cpp_features      = ['rtti', 'exceptions', 'no-rtti', 'no-exceptions']
 )
 
-[params]
+@[params]
 pub struct FlagConfig {
 pub:
 	pic                          bool = true // TODO
 	debug                        bool = true // false = release
 	platform_level               int  = 21
-	arch                         string               [required]
+	arch                         string               @[required]
 	neon                         bool
 	arm_mode                     string = 'thumb' // or 'arm'
 	lang                         CompilerLanguageType = .c
@@ -29,7 +29,7 @@ pub:
 
 pub struct FlagGen {
 pub:
-	ndk_version string [required]
+	ndk_version string @[required]
 }
 
 pub struct FlagResult {

android/ndk/ndk.v

@@ -205,7 +205,7 @@ fn min_version_supported_by_vab() string {
 }
 
 // host_arch returns the host architecture string for the platform which `vab` was compiled on.
-[inline]
+@[inline]
 pub fn host_arch() string {
 	$if linux {
 		return 'linux-x86_64'
@@ -224,7 +224,7 @@ pub fn host_arch() string {
 
 // arch_to_instruction_set maps `arch` to an instruction set
 // Example: assert ndk.arch_to_instruction_set('x86') == 'i686'
-[inline]
+@[inline]
 pub fn arch_to_instruction_set(arch string) string {
 	return match arch {
 		'armeabi-v7a' { 'armv7a' }
@@ -237,7 +237,7 @@ pub fn arch_to_instruction_set(arch string) string {
 
 // bin_path returns the absolute path to the host architecture's `bin` directory.
 // As an example: `/path/to/ndk/toolchains/llvm/prebuilt/linux-x86_64/bin`.
-[inline]
+@[inline]
 pub fn bin_path(ndk_version string) string {
 	return os.join_path(root_version(ndk_version), 'toolchains', 'llvm', 'prebuilt', host_arch(),
 		'bin')

android/screenshot.v

@@ -8,7 +8,7 @@ import vab.util as vabutil
 import vab.android.env
 import vab.android.util
 
-[params]
+@[params]
 pub struct SimpleScreenshotOptions {
 pub:
 	verbosity int