fix polkit rules installation script

the dpkg-query test was inverted
the rules directory should be /usr/share/polkit-1

Author: Stefal

CHANGELOG.md

@@ -10,7 +10,7 @@
 - Fix missing zeroconf installation when executing `./install.sh --all`. Thanks to @Jef239 [#520](https://github.com/Stefal/rtkbase/issues/520)
 - Fix crash whith empty zeroconf service list and missing WinPcap. Thanks to @Jef239 [#520](https://github.com/Stefal/rtkbase/issues/520)
 - Fix tcp host addr not read/saved correctly. Thanks to @y3nd
-- Fix polkit rules to be able to start/stop rtkbase services without sudo privileges.
+- Fix polkit path and rules to be able to start/stop rtkbase services without sudo privileges.
 
 ### Deprecated
 

tools/install_polkit_rules.sh

@@ -7,13 +7,13 @@ RTKBASE_USER=$1
 SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
 
 add_polkit_rules() {
-  cp "${SCRIPT_DIR}"/polkit/*.rules /etc/polkit-1/rules.d/ && \
+  cp "${SCRIPT_DIR}"/polkit/*.rules /usr/share/polkit-1/rules.d/ && \
   groupadd -f rtkbase                               && \
   usermod -a -G rtkbase "${RTKBASE_USER}"
 }
 
 #check if polkitd package is available, else exit
 apt-cache --quiet=0 show polkitd 2>&1 | grep -q 'No packages found' && exit 1
 #install it if not already installed
-! dpkg-query -W --showformat='${Status}\n' polkitd >/dev/null 2>&1 && apt-get -y install polkitd
+dpkg-query -W --showformat='${Status}\n' polkitd >/dev/null 2>&1 && apt-get -y install polkitd
 add_polkit_rules