roll PyInstaller back to pre-bootloader work that may be causing error messages in GAM

src/travis/linux-before-install.sh

@@ -104,7 +104,7 @@ else
     $pip install staticx
   fi
 
-  $pip install --upgrade https://github.com/pyinstaller/pyinstaller/archive/develop.tar.gz
+  $pip install --upgrade git+git://github.com/pyinstaller/pyinstaller.git@$PYINSTALLER_COMMIT
 
   cd $whereibelong
 fi

src/travis/osx-before-install.sh

@@ -107,4 +107,5 @@ cd $whereibelong
 $pip install --upgrade pip
 $pip list --outdated --format=freeze | grep -v '^\-e' | cut -d = -f 1  | xargs -n1 $pip install -U
 $pip install --upgrade -r src/requirements.txt
-$pip install --upgrade https://github.com/pyinstaller/pyinstaller/archive/develop.tar.gz
+$pip install --upgrade git+git://github.com/pyinstaller/pyinstaller.git@$PYINSTALLER_COMMIT
+ 

src/travis/windows-before-install.sh

@@ -64,9 +64,9 @@ $pip install --upgrade -r src/requirements.txt
 # lots of malware uses PyInstaller default bootloader
 # https://stackoverflow.com/questions/53584395/how-to-recompile-the-bootloader-of-pyinstaller
 echo "Downloading PyInstaller..."
-wget --quiet https://github.com/pyinstaller/pyinstaller/archive/develop.tar.gz
-tar xf develop.tar.gz
-cd pyinstaller-develop/bootloader
+wget --quiet https://github.com/pyinstaller/pyinstaller/archive/$PYINSTALLER_COMMIT.tar.gz
+tar xf $PYINSTALLER_COMMIT.tar.gz
+cd pyinstaller-$PYINSTALLER_COMMIT/bootloader
 echo "bootloader before:"
 md5sum ../PyInstaller/bootloader/Windows-${BITS}bit/*