Fix build android build error

* Resolves COMPMID-5422

Change-Id: Ib59d85aead3f8f9559392957fbc42a4ddbb27b07
Signed-off-by: Pablo Tello <pablo.tello@arm.com>
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/c/VisualCompute/ComputeLibrary/+/440126
Comments-Addressed: bsgcomp <bsgcomp@arm.com>
Tested-by: bsgcomp <bsgcomp@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/7987
Benchmark: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/scripts/arm_compute_library_nn_driver.go b/scripts/arm_compute_library_nn_driver.go
index e001402..73a5ce4 100644
--- a/scripts/arm_compute_library_nn_driver.go
+++ b/scripts/arm_compute_library_nn_driver.go
@@ -11,7 +11,7 @@
     "strings"
 )
 
-func isVersionAtLeast(version_name string, target_version int) []bool {
+func isVersionAtLeast(version_name string, target_version int) bool {
     name_map := map[string]int {
     "L": 5, "5": 5,
     "M": 6, "6": 6,
@@ -23,10 +23,11 @@
     "S": 12, "12": 12,
     "T": 13, "13": 13,
     }
-    if ! name_map[version_name] {
+    if _, ok := name_map[version_name]; ok {
+        return name_map[version_name] >= target_version
+    } else {
         return false
     }
-    return name_map[version_name] >= target_version
 }
 
 func globalFlags(ctx android.BaseContext) []string {