Update to the 2019 wpilib

Lots of gratuitious incompatibilities to deal with. Started sanifying a
few classes rather than figuring out how to update them too. Has not yet
been tested on a robot, but everything still builds so it should be
fine.

Also ported over our FPGA timestamp fixes, which were previously only in
allwpilib_2018.

Also upgraded to the new roborio compiler, which has to happen at the
same time due to incompatible pre-compiled libraries.

Change-Id: Ib9b6ad8fc0112d90a9855afe1b706588ef4ebde9
diff --git a/frc971/wpilib/ahal/SPI.cc b/frc971/wpilib/ahal/SPI.cc
index 84a72db..00e7dc9 100644
--- a/frc971/wpilib/ahal/SPI.cc
+++ b/frc971/wpilib/ahal/SPI.cc
@@ -5,13 +5,13 @@
 /* the project.                                                               */
 /*----------------------------------------------------------------------------*/
 
-#include "HAL/SPI.h"
+#include "hal/SPI.h"
 #include "frc971/wpilib/ahal/SPI.h"
 
 #include <cstring>
 
-#include "HAL/HAL.h"
-#include "llvm/SmallVector.h"
+#include "hal/HAL.h"
+#include "wpi/SmallVector.h"
 
 using namespace frc;
 
@@ -87,7 +87,7 @@
 int SPI::Read(bool initiate, uint8_t *dataReceived, int size) {
   int retVal = 0;
   if (initiate) {
-    llvm::SmallVector<uint8_t, 32> dataToSend;
+    wpi::SmallVector<uint8_t, 32> dataToSend;
     dataToSend.resize(size);
     retVal = HAL_TransactionSPI(m_port, dataToSend.data(), dataReceived, size);
   } else {