Externals: update libusb to version 1.0.19

Externals/libusb/Xcode/common.xcconfig

@@ -0,0 +1,49 @@
+//
+// libusb Xcode configuration file
+// Copyright © 2012 Pete Batard <pete@akeo.ie>
+// For more information, please visit: <http://libusb.info>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+// libusb does not follow C99 strict aliasing rules, so disable it.
+GCC_STRICT_ALIASING = NO
+
+// Use C99 dialect.
+GCC_C_LANGUAGE_STANDARD = c99
+
+// Compiler warnings.
+GCC_WARN_64_TO_32_BIT_CONVERSION = YES
+GCC_WARN_ABOUT_RETURN_TYPE = YES
+GCC_WARN_UNINITIALIZED_AUTOS = YES
+GCC_WARN_FOUR_CHARACTER_CONSTANTS = YES
+GCC_WARN_SHADOW = YES
+GCC_WARN_INITIALIZER_NOT_FULLY_BRACKETED = YES
+GCC_WARN_ABOUT_MISSING_FIELD_INITIALIZERS = YES
+GCC_WARN_ABOUT_MISSING_PROTOTYPES = YES
+GCC_WARN_ABOUT_MISSING_NEWLINE = YES
+GCC_WARN_UNKNOWN_PRAGMAS = YES
+GCC_WARN_UNUSED_FUNCTION = YES
+GCC_WARN_UNUSED_LABEL = YES
+GCC_WARN_UNUSED_VARIABLE = YES
+CLANG_WARN_EMPTY_BODY = YES
+CLANG_WARN_CONSTANT_CONVERSION = YES
+CLANG_WARN_ENUM_CONVERSION = YES
+CLANG_WARN_INT_CONVERSION = YES
+CLANG_WARN_DOCUMENTATION_COMMENTS = YES
+CLANG_WARN_BOOL_CONVERSION = YES
+
+// Static analyzer warnings.
+CLANG_ANALYZER_SECURITY_FLOATLOOPCOUNTER = YES
+CLANG_ANALYZER_SECURITY_INSECUREAPI_RAND = YES