ENH:OTBIO need now to link boost_regex library

CMake/ImportBoost.cmake

@@ -6,7 +6,7 @@ MARK_AS_ADVANCED(OTB_USE_EXTERNAL_BOOST)
 
 IF(OTB_USE_EXTERNAL_BOOST)
   # Import the package
-  FIND_PACKAGE(Boost)
+  FIND_PACKAGE(Boost REQUIRED COMPONENTS regex)
   MARK_AS_ADVANCED(Boost_DIR)
   IF(Boost_FOUND)
     MESSAGE(STATUS "  Found Boost version ${Boost_VERSION}")

Code/IO/CMakeLists.txt

@@ -38,7 +38,7 @@ ADD_LIBRARY(OTBIO ${OTBIO_SRCS})
 #    PROPERTIES
 #    LINK_INTERFACE_LIBRARIES ""
 #  )
-TARGET_LINK_LIBRARIES (OTBIO  ${TIFF_LIBRARY} ${GEOTIFF_LIBRARY}  ${GDAL_LIBRARY} ${OGR_LIBRARY} ${JPEG_LIBRARY} ${OPENTHREADS_LIBRARY} OTBCommon OTBBasicFilters OTBCurlAdapters)
+TARGET_LINK_LIBRARIES (OTBIO  ${TIFF_LIBRARY} ${GEOTIFF_LIBRARY}  ${GDAL_LIBRARY} ${OGR_LIBRARY} ${JPEG_LIBRARY} ${OPENTHREADS_LIBRARY} ${Boost_REGEX_LIBRARY} OTBCommon OTBBasicFilters OTBCurlAdapters)
 TARGET_LINK_LIBRARIES (OTBIO ITKIO ITKCommon otbkml tinyXML)
 
 IF (OTB_USE_LIBLAS)