phosphor-fan-presence: use c++17

Update configure.ac to choose the c++17 standard

Change-Id: I9c7bba8ae28101e95eb969dd1d1ae01f37cd3e48
Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com>
diff --git a/configure.ac b/configure.ac
index 0cb53a8..544b763 100644
--- a/configure.ac
+++ b/configure.ac
@@ -22,7 +22,7 @@
 [AC_MSG_ERROR([Could not find python-2.7 installed...python-2.7 is required])])
 
 # Checks for typedefs, structures, and compiler characteristics.
-AX_CXX_COMPILE_STDCXX_14([noext])
+AX_CXX_COMPILE_STDCXX_17([noext])
 AX_APPEND_COMPILE_FLAGS([-Wall -Werror], [CXXFLAGS])
 
 # Checks for libraries.