Doc: use standard wording in \brief commands

QDoc does some magic with the \class and \namespaces
and \brief commands, so the following wording must be used:
"The xxx class yyy ..."

Change-Id: Id231f30e8464898b776888d5423523de404aae34
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/libs/utils/qtcprocess.cpp

@@ -45,7 +45,8 @@ using namespace Utils;
 /*!
     \class Utils::QtcProcess
 
-    \brief This class provides functionality for dealing with shell-quoted process arguments.
+    \brief The QtcProcess class provides functionality for dealing with
+    shell-quoted process arguments.
 */
 
 #ifdef Q_OS_WIN