remame login to p_login

p_login makes more sense cause p_login sound like proot login where login is login

- refactored a test script

Author: SaicharanKandukuri

udroid/src/proot-utils/proot-utils.sh

@@ -50,7 +50,7 @@ is_valid_rootfs() {
     } && return 0 || return 1
 }
 
-login() {
+p_login() {
     # OPTIONS:
     # --disable-special-mounts
     # --disable-auto-init

udroid/test/test_mount.sh

@@ -9,7 +9,7 @@ PROOTD_DIR="$TERMUX_ROOT/usr/var/lib/proot-distro/installed-rootfs"
 source ../src/proot-utils/proot-utils.sh
 
 # works only with udroid-impish-xfce4 for now
-if (login --path ${PROOTD_DIR}/udroid-impish-xfce4 -- echo "Hello"); then
+if (p_login --path ${PROOTD_DIR}/udroid-impish-xfce4 -- echo "Hello"); then
     echo "[TEST] Login successful"
     [[ -n $RETURN_ON_FAILURE ]] && return 0
 else