Silence -Wqual-cast warnings from GCC 5.2

There were a number of const qualifiers being cast away which caused warnings.
This cluttered the output hiding real errors.  Silence them by explicit casting.
NFC.

llvm-svn: 250662
diff --git a/lldb/source/Core/DataExtractor.cpp b/lldb/source/Core/DataExtractor.cpp
index 9e44798..a884376 100644
--- a/lldb/source/Core/DataExtractor.cpp
+++ b/lldb/source/Core/DataExtractor.cpp
@@ -142,8 +142,8 @@
 // The data must stay around as long as this object is valid.
 //----------------------------------------------------------------------
 DataExtractor::DataExtractor (const void* data, offset_t length, ByteOrder endian, uint32_t addr_size, uint32_t target_byte_size/*=1*/) :
-    m_start     ((uint8_t*)data),
-    m_end       ((uint8_t*)data + length),
+    m_start     (const_cast<uint8_t *>(reinterpret_cast<const uint8_t *>(data))),
+    m_end       (const_cast<uint8_t *>(reinterpret_cast<const uint8_t *>(data)) + length),
     m_byte_order(endian),
     m_addr_size (addr_size),
     m_data_sp   (),
@@ -287,7 +287,7 @@
     }
     else
     {
-        m_start = (uint8_t *)bytes;
+        m_start = const_cast<uint8_t *>(reinterpret_cast<const uint8_t *>(bytes));
         m_end = m_start + length;
     }
     return GetByteSize();
diff --git a/lldb/source/Core/Scalar.cpp b/lldb/source/Core/Scalar.cpp
index 879c7eb..e16f74b 100644
--- a/lldb/source/Core/Scalar.cpp
+++ b/lldb/source/Core/Scalar.cpp
@@ -264,7 +264,7 @@
     case e_ulonglong:
     case e_sint128:
     case e_uint128:
-        return (void *)m_integer.getRawData();
+        return const_cast<void *>(reinterpret_cast<const void *>(m_integer.getRawData()));
     case e_float:
         flt_val = m_float.convertToFloat();
         return (void *)&flt_val;
@@ -273,7 +273,7 @@
         return (void *)&dbl_val;
     case e_long_double:
         llvm::APInt ldbl_val = m_float.bitcastToAPInt();
-        return (void *)ldbl_val.getRawData();
+        return const_cast<void *>(reinterpret_cast<const void *>(ldbl_val.getRawData()));
     }
     return NULL;
 }
diff --git a/lldb/source/Core/StreamString.cpp b/lldb/source/Core/StreamString.cpp
index ef2b705..36e086b 100644
--- a/lldb/source/Core/StreamString.cpp
+++ b/lldb/source/Core/StreamString.cpp
@@ -37,7 +37,7 @@
 size_t
 StreamString::Write (const void *s, size_t length)
 {
-    m_packet.append ((char *)s, length);
+    m_packet.append (reinterpret_cast<const char *>(s), length);
     return length;
 }