Add fPIC cmake flag for libmongocrypt build instructions
@@ -26,7 +26,7 @@ Then build libmongocrypt:
git clone git@github.com:10gen/libmongocrypt.git
cd libmongocrypt
mkdir cmake-build && cd cmake-build
-cmake -DCMAKE_PREFIX_PATH="/path/to/bson-install" ../
+cmake -DCMAKE_C_FLAGS="-fPIC" -DCMAKE_PREFIX_PATH="/path/to/bson-install" ../
make
```
