feat: 集成Tesseract源码到项目中

Description:   由于仓库中的Tesseract不是最新版本导致产生了一个bug，因此将Tesseract源码集成到项目中

Log: no
Change-Id: I088de95d6c6ab670406daa8d47ed2ed46929c2c0

3rdparty/tesseract_ocr/tesseract/src/arch/dotproductfma.cpp

@@ -0,0 +1,61 @@
+///////////////////////////////////////////////////////////////////////
+// File:        dotproductfma.cpp
+// Description: Architecture-specific dot-product function.
+// Author:      Stefan Weil
+//
+// (C) Copyright 2015, Google Inc.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+///////////////////////////////////////////////////////////////////////
+
+#if !defined(__FMA__)
+#  if defined(__i686__) || defined(__x86_64__)
+#    error Implementation only for FMA capable architectures
+#  endif
+#else
+
+#  include <immintrin.h>
+#  include <cstdint>
+#  include "dotproduct.h"
+
+namespace tesseract {
+
+// Computes and returns the dot product of the n-vectors u and v.
+// Uses Intel FMA intrinsics to access the SIMD instruction set.
+double DotProductFMA(const double *u, const double *v, int n) {
+  const unsigned quot = n / 8;
+  const unsigned rem = n % 8;
+  __m256d t0 = _mm256_setzero_pd();
+  __m256d t1 = _mm256_setzero_pd();
+  for (unsigned k = 0; k < quot; k++) {
+    __m256d f0 = _mm256_loadu_pd(u);
+    __m256d f1 = _mm256_loadu_pd(v);
+    t0 = _mm256_fmadd_pd(f0, f1, t0);
+    u += 4;
+    v += 4;
+    __m256d f2 = _mm256_loadu_pd(u);
+    __m256d f3 = _mm256_loadu_pd(v);
+    t1 = _mm256_fmadd_pd(f2, f3, t1);
+    u += 4;
+    v += 4;
+  }
+  t0 = _mm256_hadd_pd(t0, t1);
+  alignas(32) double tmp[4];
+  _mm256_store_pd(tmp, t0);
+  double result = tmp[0] + tmp[1] + tmp[2] + tmp[3];
+  for (unsigned k = 0; k < rem; k++) {
+    result += *u++ * *v++;
+  }
+  return result;
+}
+
+} // namespace tesseract.
+
+#endif