ci : fix library search path for iOS cross-compilation

Signed-off-by: Adrien Gallouët <[email protected]>

Author: angt

.github/workflows/build.yml

@@ -1164,6 +1164,7 @@ jobs:
             -DLLAMA_BUILD_SERVER=OFF \
             -DCMAKE_SYSTEM_NAME=iOS \
             -DCMAKE_OSX_DEPLOYMENT_TARGET=14.0 \
+            -DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY \
             -DCMAKE_XCODE_ATTRIBUTE_DEVELOPMENT_TEAM=ggml
           cmake --build build --config Release -j $(sysctl -n hw.logicalcpu) -- CODE_SIGNING_ALLOWED=NO