Fixing path to be compliant with new location

BUG=webrtc:7030
TBR=kjellander@webrtc.org

Review-Url: https://codereview.webrtc.org/2657943005 .
Cr-Commit-Position: refs/heads/master@{#16297}
diff --git a/tools-webrtc/ios/build_ios_libs.sh b/tools-webrtc/ios/build_ios_libs.sh
index abfa7e9..285b375 100755
--- a/tools-webrtc/ios/build_ios_libs.sh
+++ b/tools-webrtc/ios/build_ios_libs.sh
@@ -17,7 +17,7 @@
 export PATH=/usr/libexec:$PATH
 
 SCRIPT_DIR=$(cd $(dirname $0) && pwd)
-WEBRTC_BASE_DIR=${SCRIPT_DIR}/../../..
+WEBRTC_BASE_DIR=${SCRIPT_DIR}/../..
 
 function clean_artifacts {
   local output_dir=$1