The string variable handling in configuring Finit did not follow the
Buildroot best practises. This patch adds stripping quotes from all
string variables before adding them as configure arguments.
This fixes issue with, e.g., this sneaky bastard:
configure --with-rtc-date=""2024-10-12 12:34:56""
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>