abuild: do not run check in fakeroot by default

Only run check in fakeroot if options="checkroot" is set. This makes
options="!checkroot" the default.

I expect most checks work as non-root, and if a testsuite requires root,
it will likely fail in fakeroot too. Fakeroot has also shown lower
performance for parallel builds.

APKBUILD.5

@@ -298,11 +298,10 @@ Do not use this option.
 .It Cm !check
 Specifies that the package will not run a test suite.
 The reason for disabling the check phase should be noted in a comment.
-.It Cm !checkroot
-Specifies that the package's test suite will be run as a non-privileged user
-instead of using
+.It Cm checkroot
+Specifies that the package's test suite will be run in
 .Xr fakeroot 8 .
-This is necessary for some test suites which fail when run as root.
+This is necessary for some test suites which fail when run as non-root.
 .It Cm !dbg
 Specifies that the package should not be built with a debug information
 package.

abuild.in

@@ -1508,9 +1508,9 @@ create_apks() {
 }
 
 build_abuildrepo() {
-	local d apk _check=check_fakeroot
-	if options_has "!checkroot"; then
-		_check=check
+	local _check=check
+	if options_has "checkroot"; then
+		_check=check_fakeroot
 	fi
 	if ! want_check; then
 		_check=true
@@ -2125,9 +2125,9 @@ checksum() {
 }
 
 rootbld_actions() {
-	local part _check=check_fakeroot
-	if options_has "!checkroot"; then
-		_check=check
+	local part _check=check
+	if options_has "checkroot"; then
+		_check=check_fakeroot
 	fi
 	if ! want_check; then
 		_check=true