gitignore: Ignore TF-M build directories

The directory `TARGET_IGNORE` is used as a scratch area to build and
clone repositories required for TF-M.

Author: jainvikas8

.gitignore

@@ -99,7 +99,8 @@ test_suite.json
 DELIVERY/
 
 # Directory used to clone and build TF-M
-features/FEATURE_EXPERIMENTAL_API/FEATURE_PSA/TARGET_TFM/TARGET_IGNORE/
+platform/FEATURE_EXPERIMENTAL_API/FEATURE_PSA/TARGET_TFM/TARGET_TFM_V1_0/TARGET_IGNORE/
+platform/FEATURE_EXPERIMENTAL_API/FEATURE_PSA/TARGET_TFM/TARGET_TFM_V1_2/TARGET_IGNORE/
 
 # CMake
 CMakeCache.txt