bench: add "generic" dtype benchmark

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
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    status: passed
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---

Author: kgryte

lib/node_modules/@stdlib/ndarray/base/falses/benchmark/benchmark.js

@@ -46,3 +46,21 @@ bench( format( '%s:dtype=bool', pkg ), function benchmark( b ) {
 	b.pass( 'benchmark finished' );
 	b.end();
 });
+
+bench( format( '%s:dtype=generic', pkg ), function benchmark( b ) {
+	var arr;
+	var i;
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		arr = falses( 'generic', [ 0 ], 'row-major' );
+		if ( arr.length !== 0 ) {
+			b.fail( 'should have length 0' );
+		}
+	}
+	b.toc();
+	if ( !isndarrayLike( arr ) ) {
+		b.fail( 'should return an ndarray' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});