Fix git hooks for new source location

Signed-off-by: Álvaro Brey Vilas <alvaro.brey@nextcloud.com>

app/build.gradle

@@ -410,7 +410,7 @@ task installGitHooks(type: Copy, group: "development") {
     from("${project.rootDir}/scripts/hooks") {
         include '*'
     }
-    into '.git/hooks'
+    into "${project.rootDir}/.git/hooks"
 }
 
 detekt {

scripts/hooks/pre-commit

@@ -3,12 +3,12 @@
 echo "Running pre-commit checks."
 
 if ! ./gradlew --daemon ktlint &>/dev/null; then
-    echo >&2 "Lint failed! See report at file://$(pwd)/build/ktlint.txt"
+    echo >&2 "Lint failed! See report at file://$(pwd)/app/build/ktlint.txt"
     echo >&2 "Hint: fix most lint errors with ./gradlew ktlintFormat"
     exit 1
 fi
 
 if ! ./gradlew --daemon detekt &>/dev/null; then
-    echo >&2 "Detekt failed! See report at file://$(pwd)/build/reports/detekt/detekt.html"
+    echo >&2 "Detekt failed! See report at file://$(pwd)/app/build/reports/detekt/detekt.html"
     exit 1
 fi