Added './' prefix to all directories in .astyleignore

This forces directory searching to not over-exclude files.

Also sorted the list, because it's nice.

.astyleignore

@@ -1,29 +1,29 @@
-BUILD
-cmsis
-features/cryptocell
-features/mbedtls
-features/lwipstack/lwip
-features/lwipstack/lwip-sys
-rtos/TARGET_CORTEX/rtx4
-features/storage/filesystem/littlefs/littlefs/
-features/storage/filesystem/fat/ChaN
-features/storage/FEATURE_STORAGE
-features/frameworks
-features/FEATURE_BLE
-features/unsupported/
-features/netsocket/emac-drivers
-hal/storage_abstraction
-TESTS/mbed_hal/trng/pithy
-features/nanostack/coap-service
-features/nanostack/sal-stack-nanostack
-features/nanostack/targets
-rtos/TARGET_CORTEX/rtx5
-TESTS/mbed_hal/trng/pithy
-targets
-components/802.15.4_RF
-components/TARGET_PSA/TARGET_TFM
-tools
-components/TARGET_PSA/TESTS
-components/TARGET_PSA/services/attestation/COMPONENT_PSA_SRV_IMPL/tfm_impl
-components/TARGET_PSA/services/attestation/qcbor
-components/TARGET_PSA/services/attestation/attestation.h
+./BUILD
+./cmsis
+./components/802.15.4_RF
+./components/TARGET_PSA/services/attestation/attestation.h
+./components/TARGET_PSA/services/attestation/COMPONENT_PSA_SRV_IMPL/tfm_impl
+./components/TARGET_PSA/services/attestation/qcbor
+./components/TARGET_PSA/TARGET_TFM
+./components/TARGET_PSA/TESTS
+./features/cryptocell
+./features/FEATURE_BLE
+./features/frameworks
+./features/lwipstack/lwip
+./features/lwipstack/lwip-sys
+./features/mbedtls
+./features/nanostack/coap-service
+./features/nanostack/sal-stack-nanostack
+./features/nanostack/targets
+./features/netsocket/emac-drivers
+./features/storage/FEATURE_STORAGE
+./features/storage/filesystem/fat/ChaN
+./features/storage/filesystem/littlefs/littlefs/
+./features/unsupported/
+./hal/storage_abstraction
+./rtos/TARGET_CORTEX/rtx4
+./rtos/TARGET_CORTEX/rtx5
+./targets
+./TESTS/mbed_hal/trng/pithy
+./TESTS/mbed_hal/trng/pithy
+./tools