Add address sanitizer to travis build

Jan Breuer

2015-10-04 18e1b0a79139dd13d5f9770e840f2c4e59aac7e2

 libscpi/inc/scpi/types.h

@@ -142,6 +142,7 @@
        SCPI_TOKEN_COMMA,
        SCPI_TOKEN_SEMICOLON,
        SCPI_TOKEN_COLON,
        SCPI_TOKEN_SPECIFIC_CHARACTER,
        SCPI_TOKEN_QUESTION,
        SCPI_TOKEN_NL,
        SCPI_TOKEN_HEXNUM,