fix(installer): Fix the same pkgbase being built multiple times on error

The previous fix commit ec837c8 failed to address the case where the
build fails, as packages are only added to builtPkgDests on a successful
build. This commit addresses this by adding the package to the map earlier.

Fixes Jguer#2560.

pkg/sync/build/installer.go

@@ -238,6 +238,8 @@ func (installer *Installer) installAURPackages(ctx context.Context,
 		} else {
 			var errMake error
 			installer.log.Debugln("building pkgbase", base, "package", name)
+			builtPkgDests[base] = pkgdests
+
 			pkgdests, errMake = installer.buildPkg(ctx, dir, base,
 				installIncompatible, cmdArgs.ExistsArg("needed"), aurOrigTargetBases.Contains(base))
 			if errMake != nil {
@@ -249,8 +251,6 @@ func (installer *Installer) installAURPackages(ctx context.Context,
 				installer.log.Errorln(gotext.Get("error making: %s", base), "-", errMake)
 				continue
 			}
-
-			builtPkgDests[base] = pkgdests
 		}
 
 		if len(pkgdests) == 0 {