Update docs

Author: petk

docs/cmake/configuration.md

@@ -190,6 +190,7 @@ Some useful overridable configuration options built into CMake itself. All these
 * [`PHP_UNDEFINED_SANITIZER`](/docs/variables/_PHP_UNDEFINED_SANITIZER.md)
 * [`PHP_USE_RTLD_NOW`](/docs/cmake/variables/PHP_USE_RTLD_NOW.md)
 * [`PHP_VALGRIND`](/docs/cmake/variables/PHP_VALGRIND.md)
+* [`PHP_VERBOSE_LINK`](/docs/cmake/variables/PHP_VERBOSE_LINK.md)
 * [`SED_EXECUTABLE`](/docs/cmake/variables/SED_EXECUTABLE.md)
 
 * [`PEAR`](/docs/cmake/pear.md)

docs/cmake/variables/PHP_VERBOSE_LINK.md

@@ -0,0 +1,9 @@
+# `PHP_VERBOSE_LINK`
+
+* Default: `OFF`
+* Values: `ON|OFF`
+
+Enable verbose output by linker at the link step when building.
+
+See [PHP/VerboseLink](/docs/cmake/modules/PHP/VerboseLink.md) module for more
+info.