Update install_requirements.sh

dump candidate locations for pip

Author: mikekgfb

install/install_requirements.sh

@@ -46,6 +46,13 @@ fi
 echo "Using pip executable: $PIP_EXECUTABLE"
 echo "located at $(which $PIP_EXECUTABLE || echo not found)"
 
+echo
+echo "possible pip candidates are:"
+echo "pip is located at $(which pip || echo not found)"
+echo "pip3 is located at $(which pip3 || echo not found)"
+echo "pip{PYTHON_SYS_VERSION} is located at $(which pip{PYTHON_SYS_VERSION} || echo not found)"
+echo
+
 # Since torchchat often uses main-branch features of pytorch, only the nightly
 # pip versions will have the required features. The PYTORCH_NIGHTLY_VERSION value should
 # agree with the third-party/pytorch pinned submodule commit.