fix shellcheck problem

Author: ktoso

Samples/JavaDependencySampleApp/ci-validate.sh

@@ -4,7 +4,7 @@ set -e
 set -x
 
 # WORKAROUND: prebuilts broken on Swift 6.2.1 and Linux and tests using macros https://github.com/swiftlang/swift-java/issues/418
-if [[ "$(uname)" == "Darwin" ]]; then
+if [ "$(uname)" == "Darwin" ]; then
   DISABLE_EXPERIMENTAL_PREBUILTS=''
 else
   DISABLE_EXPERIMENTAL_PREBUILTS='--disable-experimental-prebuilts'

Samples/JavaKitSampleApp/ci-validate.sh

@@ -4,7 +4,7 @@ set -e
 set -x
 
 # WORKAROUND: prebuilts broken on Swift 6.2.1 and Linux and tests using macros https://github.com/swiftlang/swift-java/issues/418
-if [[ "$(uname)" == "Darwin" ]]; then
+if [ "$(uname)" == "Darwin" ]; then
   DISABLE_EXPERIMENTAL_PREBUILTS=''
 else
   DISABLE_EXPERIMENTAL_PREBUILTS='--disable-experimental-prebuilts'

Samples/JavaProbablyPrime/ci-validate.sh

@@ -4,7 +4,7 @@ set -e
 set -x
 
 # WORKAROUND: prebuilts broken on Swift 6.2.1 and Linux and tests using macros https://github.com/swiftlang/swift-java/issues/418
-if [[ "$(uname)" == "Darwin" ]]; then
+if [ "$(uname)" == "Darwin" ]; then
   DISABLE_EXPERIMENTAL_PREBUILTS=''
 else
   DISABLE_EXPERIMENTAL_PREBUILTS='--disable-experimental-prebuilts'

Samples/SwiftJavaExtractJNISampleApp/ci-validate.sh

@@ -4,7 +4,7 @@ set -x
 set -e
 
 # WORKAROUND: prebuilts broken on Swift 6.2.1 and Linux and tests using macros https://github.com/swiftlang/swift-java/issues/418
-if [[ "$(uname)" == "Darwin" ]]; then
+if [ "$(uname)" == "Darwin" ]; then
   DISABLE_EXPERIMENTAL_PREBUILTS=''
 else
   DISABLE_EXPERIMENTAL_PREBUILTS='--disable-experimental-prebuilts'